Yeah, they really should have just looked at rebranding. A few Instagram-related services (e.g. Webstagram, Statigram) had to do so recently, IIRC, and I don't

Yeah, they really should have just looked at rebranding. A few Instagram-related services (e.g. Webstagram, Statigram) had to do so recently, IIRC, and I don't think they're significantly worse off. Thing is, even if Twitter tacitly condoned it for years, the name "TwitPic" is pretty obviously derived from "Twitter" and is trading on their (Twitter Inc.'s) reputation. Even their logo is styled similarly to the old Twitter wordmark. The blog post didn't even say Twitter wanted to force them to stop using the name, only that they shouldn't attempt to register a confusingly-similar trademark (though granted, forcing a rebrand might well have been the next step).